Automotive High Current, Wide VIN Synchronous Buck Controller Reference Design Featuring LM5141-Q1


Design files


PMP15019 uses the LM5141-Q1 low Iq synchronous buck controller as the centerpiece of a high current automotive DC/DC power supply. The PMP15019 operates over the input voltage range of VOUT + 0.5V to 42V. The EVM provides a 5.0V output (default) with a maximum load current of 15A, 20A transient.  The device offers configurability and VOUT can be set to 3.3V and the oscillator frequency can be set up to switch at 440 kHz (default) or 2.2 MHz.

  • 5.5V to 42Vin, 5V @15A continuous, 20A peak
  • ~93.5% efficiency
  • Solution size: 2.0 inch x 3.0 inch (max component height: 0.4 inch)
Output voltage options PMP15019.1
Vin (Min) (V) 5.5
Vin (Max) (V) 42
Vout (Nom) (V) 5
Iout (Max) (A) 20
Output Power (W) 100
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Buck- Synchronous
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUCZ0.PDF (1654 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

TIDRQ59.PDF (346 K)

Detailed schematic diagram for design layout and components

TIDRQ60.PDF (110 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRQ61.PDF (218 K)

Detailed overview of design layout for component placement

TIDRQ63A.ZIP (582 K)

Files used for 3D models or 2D drawings of IC components

TIDCD90.ZIP (411 K)

Design file that contains information on physical board layer of design PCB

TIDRQ62.PDF (1297 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Buck controllers (external switch)

LM5141-Q1Automotive wide-input 2.2-MHz low-IQ synchronous buck controller

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Test report PMP15019 Test Results Feb. 28, 2017

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